<template>
  <div class="app-container">
    <el-row :gutter="10" class="mb8">
      <el-col :span="1.5">
        <el-button
            type="primary"
            plain
            icon="Upload"
            @click="handleImport"
        >导入
        </el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
            type="warning"
            plain
            icon="Download"
            @click="handleExport"
        >导出
        </el-button>
      </el-col>
    </el-row>

    <el-table
        :data="categoryList"
        style="width: 100%"
        row-key="id"
        border
        lazy
        :load="fetchData"
        :tree-props="{ children: 'children', hasChildren: 'hasChildren' }"
    >
      <el-table-column prop="name" label="分类名称"/>
      <el-table-column prop="imageUrl" label="图标" #default="scope">
        <img :src="scope.row.imageUrl" width="50"/>
      </el-table-column>
      <el-table-column prop="orderNum" label="排序"/>
      <el-table-column prop="status" label="状态" #default="scope">
        {{ scope.row.status == 1 ? '正常' : '停用' }}
      </el-table-column>
      <el-table-column prop="createTime" label="创建时间"/>
    </el-table>

    <!-- 用户导入对话框 -->
    <el-dialog :title="upload.title" v-model="upload.open" width="400px">
      <el-upload
          ref="upload"
          :limit="1"
          accept=".xlsx, .xls"
          :headers="upload.headers"
          :action="upload.url + '?updateSupport=' + upload.updateSupport"
          :disabled="upload.isUploading"
          :on-progress="handleFileUploadProgress"
          :on-success="handleFileSuccess"
          :auto-upload="false"
          drag
      >
        <i class="el-icon-upload"></i>
        <div class="el-upload__text">
          将文件拖到此处，或
          <em>点击上传</em>
        </div>
        <div class="el-upload__tip" style="color:red" slot="tip">提示：仅允许导入“xls”或“xlsx”格式文件！</div>
      </el-upload>
      <div slot="footer" class="dialog-footer">
        <el-button type="primary" @click="submitFileForm">确 定</el-button>
        <el-button @click="upload.open = false">取 消</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script setup name="Category">
import {getCategoryById} from "@/api/product/category.js"
import {ElMessage} from "element-plus";
import {getCurrentInstance} from "vue";
import {getToken} from "@/utils/auth";

const loading = ref(true)
const categoryList = ref([]);
const {proxy} = getCurrentInstance()

async function getList(id) {
  let {code, data} = await getCategoryById(id);
  if (code == 200) {
    loading.value = false;
    categoryList.value = data
  } else {
    ElMessage.error("请求失败！")
  }
}

getList(0)
//数据列表
const fetchData = async (row, treeNode, resolve) => {
  const {code, data, message} = await getCategoryById(row.id);
  resolve(data)
}
const data = reactive({
  queryParams: {}
})
const {queryParams} = toRefs(data)

//导出按钮
function handleExport() {
  proxy.download('product/category/download', {...queryParams.value}, `category_${new Date().getTime()}.xlsx`)
}

//导入按钮
// 用户导入参数
const upload = reactive({
  // 是否显示弹出层（用户导入）
  open: false,
  // 弹出层标题（用户导入）
  title: "",
  // 是否禁用上传
  isUploading: false,
  // 是否更新已经存在的用户数据
  updateSupport: 0,
  // 设置上传的请求头部
  headers: {Authorization: "Bearer " + getToken()},
  // 上传的地址
  url: import.meta.env.VITE_APP_BASE_API + "/product/category/upload"
})


/** 导入按钮操作 */
function handleImport() {
  upload.title = "用户导入";
  upload.open = true;
}

// 文件上传中处理
function handleFileUploadProgress(event, file, fileList) {
  upload.isUploading = true;
}

// 文件上传成功处理
function handleFileSuccess(response, file, fileList) {
  upload.open = false;
  upload.isUploading = false;
  proxy.$refs.upload.clearFiles();
  proxy.$alert(response.msg, "导入结果", {dangerouslyUseHTMLString: true});
  getList(0);
}

// 提交上传文件
function submitFileForm() {
  proxy.$refs.upload.submit();
}
</script>